Drill press and gas lamp: what they have in common

1. Step 1. Drill press — works like — Electric drill. A drill press and a hand drill do the same — spin a bit — but the press is fixed to a bench.
2. Step 2. Electric drill — evolved from — Bow drill. The oldest rotary drilling tool.
3. Step 3. Bow drill — is used in — Fire making. The bow drill is a way of making fire.
4. Step 4. Fire making — uses — Combustion. Fire is combustion.
5. Step 5. Combustion — is used in — Gas lamp. The flame gives the light.

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